BS ISO 6727:2021 pdf download.Road vehicles — Motorcycles and mopeds — Symbols for controls, indicators and tell-tales. 4.10 Letters and numerals may be used as symbols, but are not registered by ISO/TC 145, Graphical symbols, or published in ISO 7000. For example, the letters R, N, D, listed as symbols <MG.01 to MG.03>, have the meaning indicated when used in...